High blood pressure is quickly becoming one of the most common chronic illnesses in western society.

Arthritis is yet another very common illness in today's society.

It is the most common illness that astronauts suffer from in space.

Taken together, they are the most common mental illnesses in the country, affecting more than 23 million Americans.

Yet surprisingly little is known about the common illnesses that plague us.

Similarly, it is said that by 2010 depression will become the most common illness in modern society.

It is estimated that by 2020 depression will be the most common illness in the developed world.

It is the most common, chronic, terminal illness among our older people.

But there are much more common illnesses that cause these same symptoms.

It is considered to be the most damaging, and common, serious mental illness.